The medicine has side effects which usually pass in a few hours but can be unpleasant, such as nausea, vomiting, diarrhoea, fever and chills.This will depend on where you are and which hospital you are in. After a few hours, if the pregnancy hasn’t passed, you may be sent home to wait. The pregnancy tissue will pass between four to six hours after taking the medicine, during which time you may be in hospital.If the tissue does not pass naturally, eventually your doctor will recommend a dilatation and curettage (D&C).It is usually not recommended for pregnancies that are older than about nine weeks. Medication is not suitable if there is very heavy bleeding or signs of infection.For a missed miscarriage, it may happen quickly, but it can take up to two weeks and, occasionally, longer. At most it will happen within a day or two. For an incomplete miscarriage, the medicine will usually encourage the pregnancy tissue to pass within a few hours. Medicine is available that can speed up the process of passing the pregnancy tissue. The waiting time can be emotionally draining for some women.A few women still need to have surgery – sometimes urgently – if they develop infection, bleed heavily or if the tissue does not pass naturally.Although excessive bleeding and blood transfusion are very rare, they are slightly more common with expectant management than with surgery.Sometimes bleeding can last for up to four weeks. Usually, the wait and see approach takes longer than any other approaches such as surgery or medication.Some women become worried or frightened when the bleeding gets heavier, especially if blood clots, tissue or even a recognisable embryo is passed.It may feel more natural, it may help with the grieving process or it may give you more of a sense of control. There are many reasons why some women prefer to wait and see.You and the doctor can discuss and decide the preferred option for you. If the tissue does not pass naturally or you have signs of infection, the doctor will recommend a dilatation and curettage (D&C).
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But if there is heavy bleeding or signs of infection you will need treatment. If your miscarriage is incomplete, with just a small amount of pregnancy tissue remaining, it’s probably best to take a wait and see approach. You can use sanitary pads and take pain relieving tablets, such as paracetamol. When the pregnancy tissue passes, you are likely to have heavier bleeding with crampy, period-like pains. While you are waiting you may have some spotting or bleeding, much like a period. If it is an incomplete miscarriage (where some but not all pregnancy tissue has passed) it will often happen within days, but for a missed miscarriage (where the fetus or embryo has stopped growing but no tissue has passed) it might take as long as three to four weeks. If nothing is done, sooner or later the pregnancy tissue will pass naturally. You can choose to wait and see what will happen. Any treatment you have will be aimed at avoiding heavy bleeding and infection.Ī discussion with the doctor or nurse will help you to work out which treatment options are best and safest for you. If a miscarriage has begun, there is nothing that can be done to stop it.